Smartwatch circuit design has advanced with the integration of optical and motion sensors, providing precise data on physical conditions. ROHM leads in developing sensors for healthcare, ensuring accuracy and adaptability. These sensors extend beyond pulse wave detection, offering insights into diverse body conditions like heart rate variability and stress levels. The synergy of technology and design empowers users with real-time health insights, fostering proactive wellness management. Wearable sensors promise a future where personalized health monitoring becomes seamless, guiding individuals towards holistic well-being.